Wrench.



'5.HAGBRSTRAND.- WRENOH.

LPPLIGATION -PILBD JUNE 30! 1908.

Patented May 11,1909.

c7231 @9i/gz u- Wf/ T/vgsss.- INI/ENTOR I Fra/vd Wagens rand I f, n BVM! 1 H y zaflgey narran srnrns ERLAND HAGERSTRAND, OF MICHIGAN CITY, INDIANA.

WRENCH.

Specification of Letters Patent.

Application filed .Tune 30,

Patented May 1 1, 1909.

1908. lSerial No. 441,168.

To all whom it may concern: A H 'f Be it known that I, ERLAND HAGER- sTRAND, a citizen of the United States, residing at Michigan City, in the county of Laporte and State of Indiana, have invented certain new and useful Improvements in llfrenches, of which the following is a specification.

This invention relates to wrenches, and

more particularly to the means for adjusting the sliding jaw.

The object of the present invention is to provide a mechanism whereby the sliding jaw can be quickly adjusted and which will securely hold said jaw in adjusted position. The mechanism is compound, so that if one portion of it breaks or becomes worn, the other portion may still be used to adjust the jaw..

In the accompanying drawings, Figure 1 is an elevation of the invention. Fig. 2 is an edge view. Fig. 3 is a sectional view of the wrenchhead. Fig. i is an elevation of the sliding jaw and the means for operating` the same.

Referring specifically to the drawings, 5 denotes the handle of the'wrench, and 6 is the head which is formed with a rigid jam 7, with which the movable jaw 8 cooperates. The jaws are arranged transversely to the handle 5.

On the bottom of the jaw 8 is a guide rib 9 which fits in a slideway made in the wrenchhead. Said rib is continued at the inner end of the jaw to form a shank 1() extending at right angles to the jaw-face. The shank works in a transverse opening 11 in the wrench-head. The rib lhas longitudinal grooves 12 on opposite sides into which extend guide-ribs 13 on the side Walls of the slideway and the transverse opening 11.

On the bottom of the rib 9 and the shank 10 is a rack 14 which is engageable by a worm nut 15 having a threaded axial bore 16 to receive a screw stem 17 which is carried by the shank 10, being attached to the end thereof opposite the jaw 8, the stem beingproperly spaced from the rack and extending Vparallel t ereto so that the worm may engage the same. The stem 17 is rigidly connected to the shank 1() so that the sliding jaw 8 is operated by the engagement of the worm with the rack and also by the engagement of the interior threads of the worm with the threads of the screw. By this compound sliding adl justment, a wrench of great strength is had, and if one of the adjusting means gets broken or worn, the other may be employed 'so that the wrench may still be used.

The wrench-head has a recess 1S to receive the worm 15 and transverse openings 19 on opposite sides thereof in which the screw stem 17 is free to slide back and forth. The screw stem is enlarged at one end and secured to the outer endof the shank 10 by a screw 20, or in any other suitable manner. The contiguous surfaces of the parts 10 and 17 are serrated or threaded in order that they may be more securely connected, and by removing the screw 2() and turning the stem 17 said stem will be disengaged from the shank 10 and also from the nut 15, allowing the wrench head to come apart and permitting the removal of the jaw 8 and the substitution of another of different form if desired.

I claim:

1. A. wrench having a head with a fixed jaw and a guide recess therein, a movable jaw having a shank slidable in said recess, a threaded stem detachably fastened to the end of said shank opposite to the jaw and extending parallel to the shank, and a nontraveling nut on the stem and in the head.

2. A wrench having a recessed head with a fixed jaw, a shank slidable in the recess and having a movable jaw at one end thereof, the shank also having a rack thereon, a threaded stern detachably fastened to the other end of the shank and extending parallel thereto, and a nut rotatable in the head, on the stem, and having an external worm engaging the said rack.

In testimony whereof I affix my signature in presence of two witnesses.

ERLAND HAGERSTRAND Witnesses:

JOHN SwANsoN, CHAs. SWANsoN. 

